Pff, if you would have the same "problem" with school books no one would complain.
You enjoy reading comics, so do just that. After all, you're not hurting anyone with it, right?
As for the physically ill: I tend to have a nervous stomach. Meaning: Whenever I get too worked up over something, I can feel quite sick. That does not tend to be like that only because of frustration or anger, it can happen just as easily when I'm really happy about something. Could be the same for you.